Optimal representation of sensory information by neural populations

Mehrdad Jazayeri, J. Anthony Movshon

Research output: Contribution to journalArticlepeer-review


Sensory information is encoded by populations of neurons. The responses of individual neurons are inherently noisy, so the brain must interpret this information as reliably as possible. In most situations, the optimal strategy for decoding the population signal is to compute the likelihoods of the stimuli that are consistent with an observed neural response. But it has not been clear how the brain can directly compute likelihoods. Here we present a simple and biologically plausible model that can realize the likelihood function by computing a weighted sum of sensory neuron responses. The model provides the basis for an optimal decoding of sensory information. It explains a variety of psychophysical observations on detection, discrimination and identification, and it also directly predicts the relative contributions that different sensory neurons make to perceptual judgments.

Original languageEnglish (US)
Pages (from-to)690-696
Number of pages7
JournalNature Neuroscience
Issue number5
StatePublished - May 2006

ASJC Scopus subject areas

  • General Neuroscience


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